Monster Cookie Bars
These super simple Monster Cookie Bars are ready to bake in just 10 minutes! The chewy oatmeal peanut butter cookie base is full of chocolate chips and M&M's making them an irresistible treat. This cookie bar recipe is also easy to make gluten-free or double for a crowd. With this recipe, you'll get perfectly chewy, melt-in-your-mouth Monster Cookie Bars every single time!
Equipment
Ingredients
- 1/4 cup butter
- 1/4 cup sugar
- 1/4 cup dark brown sugar
- 1/3 cup creamy peanut butter
- 1 large egg
- 1 teaspoon vanilla extract
- 3/4 cup flour
- 3/4 cup old fashioned oats
- 1/2 teaspoon salt
- 1/2 teaspoon baking soda
- 1/4 teaspoon baking powder
- 1/4 cup semi-sweet chocolate chips
- 1/4-1/3 cup M&Ms
Instructions
- Preheat the oven to 350 degrees F.
- Cream the butter and sugars together with a stand or electric hand mixer until smooth and fluffy.
- Add the peanut butter, egg, and vanilla, and mix on low speed until completely combined.
- Add the flour, oats, salt, baking soda, and baking powder, and mix well with the mixer.
- Stir in the chocolate chips and M&M’s with a spoon or spatula.
- Scoop the batter into an 8x8 or 9x9 square baking dish and smooth the top.
- Bake for 20-25 minutes until golden brown.
- Allow the bars to cool for at least 30 minutes before cutting and serving.
Notes
Store in an airtight container or bag. Room-temp for up to 5 days, in the refrigerator for up to 1 week, or freeze for up to 3 months.
Double the recipe and make them in a 9x13 pan for a larger batch.
Nutrition
Serving: 1BarCalories: 265kcal
Tried this recipe?Let us know how it was!